2. A 1" reading theodolite having a multiplying constant of 100 and an additive constant of 0 was centered and levelled a height of 1.48 m above a point C of reduced level 46.87 m. A levelling staff was held vertically at points D and L in turn and the readings shown in table 1 were taken. Calculate (i) the reduced levels of points D and L (ii) the horizontal length of DL. Staff position Staff reading (m) Vertical circle Horizontal circle D L 3.240, 3.047, 2.853 2.458, 2.230, 2.002 readings 87°38'53" 92°21'36" readings 56°49'31" 98°07′18"

2. A 1" reading theodolite having a multiplying constant of 100 and an additive constant of 0 was centered and levelled a height of 1.48 m above a point C of reduced level 46.87 m. A levelling staff was held vertically at points D and L in turn and the readings shown in table 1 were taken. Calculate (i) the reduced levels of points D and L (ii) the horizontal length of DL. Staff position Staff reading (m) Vertical circle Horizontal circle D L 3.240, 3.047, 2.853 2.458, 2.230, 2.002 readings 87°38'53" 92°21'36" readings 56°49'31" 98°07′18"

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Situation 1: A two-peg test is used to check whether the ine of sight of the level is in perfect adjustment and the following rod readings are taken, with instrument set up near A, backsight on A is 1.623 m. and foresight reading on B is 2.875 m. With the instrument set up near B, backsight on B is 1.622 and a foresight on A is 0.362 m. a. Find the difference in elevation. b. What should be the correct rod reading on A to give a level line of sight with instrument still set up near B? c. What should be the correct rod reading on B to give a level line of sight with instrument still set up near A?
In the two-peg test of a dummy level, the following observations are taken. *INserted Photo* Point M is equidistance from both A and B, while P is 2.50m away from B along the extension of line AB and 90 meters from B. Requirements: Determine the true difference in elevation between point A and B. Answer: ____________ With the level still set up at P, determine the rod reading on A and B to which the line of sight should be adjusted. Answer: ____________
Apply “Rise and Fall method” for working out the reduced levels of points for which the following consecutive readings were taken with a level. 0.894, 2.643, 2.896, 4.016, 1.954, 0.692, 2.582, 0.251, 1.532, 2.996, 1.135 The instrument was shifted after the 2nd, 4th, 6th and 8th readings. The first reading was taken on the staff held on the bench mark of R.L. equal to 5757. Rule out a page of level field book and enter the above readings
A pre-engineering baseline was run down a very steep hill. Rather than measure horizontally downhill with the steel tape, the surveyor measures the vertical angle with a theodolite and the slope distance with steel tape. The vertical angle is -21° 26’ turned to a point on a plumbed range pole that is 4.88 ft above the ground. The slope distance from the theodolite to the point on the range pole is 148.61 ft. The theodolite’s optical center is 4.66 ft above the upper baseline station at 110 + 71.25. What is the stationing chainage of the lower station? Recall 110+71.25 just means it is 11,071.25 feet from the origin point of the project. The plus sign is just a separator between the hundreds of feet and the tens of feet
Complete the following level notes. Show your detailed solution and checking. Differential Leveling Station BS HI FS Elevation BM1 1.050 ---- 147.630 TP1 1.224 1.923 TP2 1.276 1.481 TP3 1.087 2.290 TP4 1.162 2.140 TP5 1.751 2.700 BM2 ---- 2.565
If the level of the known point is 10 m and the reading on the same point is 320, or what is the required reading of the ruler for a certain point that falls below the known point b) 1 cm. The height of the device is kept constant during the leveling process.
A pre-engineering baseline was run down a very steep hill (see Rather than measure horizontally downhill with the steel tape, the surveyor measures the vertical angle with a theodolite and the slope distance with steel tape. The vertical angle is -21° 26’ turned to a point on a plumbed range pole that is 4.88 ft above the ground. The slope distance from the theodolite to the point on the range pole is 148.61 ft. The theodolite’s optical center is 4.66 ft above the upper baseline station at 110 + 71.25. If the elevation of the upper station is 318.71. what is the elevation of the lower station? What is the horizontal distance between the two stations?
A differential levelling was conducted from BM1 to BM2 30 km apart. BM1 is at elevation 124. 08 m. The backsight distances averages 150 m in length and the foresight distances averages 100 m. the recorded elevation of BM2 was 274.11 m. If the level used is out of adjustment such that when the bubble was centered the line of sight was inclined 0.003 m upward in distance of 100 m. What would be the corrected elevation of BM2?
A tacheometer was set up at B.M and the following observations were made with a leveling staff held vertically at P and Q. Ins: Station Staff Station Vertical Angle Hair Readings Bearings Remarks B.M P +10° 00’ 1.050, 1.103, 1.156 40° R.L of B.M =1958.500 ft Q -15° 00’ 0.952, 1.055, 1.158 140° The constant of instrument (f/i) = 100, Height of instrument = 5.15 ft Compute: The horizontal distance between P and Q Reduced Levels of P and Q Grade between P and Q
A tower is located on a hilltop at T. Angular readings are taken with a theodolitefrom two instrumentation stations A and B, which are 50 m apart. Given the followingdata, determine the R.L. of hilltop at T and the tower height. Height of instrument (R.L.of instrumental centre) = 10 m. Vertical angles from A to the top and bottom of thetower at T is 35° and 28°(upward) respectively. Whole circle bearing of line AT, ABand BTis 25°, 110°, 5° respectively.
1. The two-peg test is used to determine if the line of sight of the telescope is parallel to the axis of the bubble tube. A tilting level is set up halfway between points A and B and rod reading on both points are 1.969 and 2.161 m respectively. The level is then set up 1.50 m away from A along the extension of line AB and 53.50 from B. Then rod readings on A and B were recorded as 1.554 m and 1.728 m, respectively. Determine if the line of sight is inclined downward or upward and the amount by which the horizontal cross hair should be moved to adjust the line of sight.
Q#1: A profile levelling is carried out and consecutive readings were observed on staff rod along a chain line at common interval of 10 meter which are listed below in table. First reading is taken on bench mark of 105.615 meter reduce level. Station Points Chainage (m) Staff Readings (m) Remarks BS IS FS 1 00 3.005 BM 2 10 2.285 3 20 1.560 4 30 1.785 5 40 2.105 6 50 2.875 3.105 CP 1 X 53.35 3.465 7 60 3.955 8 70 3.120 9 80 3.015 10 90 2.580 11 100 1.955 CP 2 Determine the reduce levels of all points using both line of collimation and rise and fall method. (Present your answer in table form).